For the record, I enjoy the majority of Monk, although as a true
fan, i feel the need to address some of the worst episodes in my
personal opinion:

Dishonorable Mentions:

Mr. Monk Goes Back to School: I just don't like this
episode for the coach and his son. Seriosuly, Monk, a former cop
who is capable of fighting, is afraid to fight the coach? He could
get him fired for threatening him for one, secondly, he decided to
give his bratty son an A because the coach inadvertently (and I
mean that in the strongest sense) solve the case?! No, NOO!!!

Mr. Monk Goes to a Rock Concert: It's honestly just the
numerous amount of inaccuries in the episode. Other than that, it
was fine. I mean really, the whole time they're trying so hard to
catch that ball,…